[PATCH v3 0/7] Refactor fetch negotiation into its own API

Thanks, Brandon and Junio, for your comments.

Updates since v2:
 - nothing new in patches 1 and 2
 - patch 3: now clear priority queue unconditionally once we are done
   with it (as requested by Brandon in a comment for a later patch)
 - patch 4: updated commit message to not mention everything_local() (as
   pointed out by Brandon), updated test to not rely on the fact that
   fetch-pack uses prefix matching (thanks, Junio, for the observation)
 - patch 5: used a more descriptive name ("struct negotiation_state")
   for the struct, instead of "struct data"
 - squashed patch 8 into patch 7; this means that the comments are not
   moved verbatim, but for the reviewer, verbatim-ness of comments is
   probably not that important anyway

Jonathan Tan (7):
  fetch-pack: split up everything_local()
  fetch-pack: clear marks before re-marking
  fetch-pack: directly end negotiation if ACK ready
  fetch-pack: use ref adv. to prune "have" sent
  fetch-pack: make negotiation-related vars local
  fetch-pack: move common check and marking together
  fetch-pack: introduce negotiator API

 Makefile              |   2 +
 fetch-negotiator.c    |   8 ++
 fetch-negotiator.h    |  57 ++++++++++
 fetch-pack.c          | 255 ++++++++++++++----------------------------
 negotiator/default.c  | 176 +++++++++++++++++++++++++++++
 negotiator/default.h  |   8 ++
 object.h              |   3 +-
 t/t5500-fetch-pack.sh |  33 ++++++
 8 files changed, 373 insertions(+), 169 deletions(-)
 create mode 100644 fetch-negotiator.c
 create mode 100644 fetch-negotiator.h
 create mode 100644 negotiator/default.c
 create mode 100644 negotiator/default.h